Improvement in ladder-jacks for supporting scaffolds



A. BAUER.

LADDER JACKS FOR SUPPORTING SCAFFOLDS. No. 178,355. Patented. June 6,1876.

vmurs: a @Md. M, W

N.FETER$, PNOTO-LITHOGRAPHER, WASHINGTON, D C.

UNITED STATES PATENT OFFICE.

ABRAHAM BAUER, OF NEW WASHINGTON, OHIO.

IMPROVEMENT IN LADDER-JACKS FOR'SUPPORTING SCAFFOLDS.

Specification forming part of Letters Patent No. 178,355, dated June 6, 1876; application filed March 6, 1876.

To all whom it may concern:

Be it known that I, ABRAHAM BAUER, of New Washington, in the county of Crawford and State of Ohio, have invented anew and Improved Ladder -Jack for Scaffolding, of

I which the following is a specification:

Figure 1 is a side view of my improved ladder-jack as applied to a ladder, and Fig. 2 is a top view of the jack detached.

Similar letters of reference indicate correspondin g parts.

My invention relates to a simple, strong, and effective ladder-jack or bracket for putting up scaffolding for carpenters, tin-smiths', painters, &c., in a quick and reliable manner without nailing; and itconsists of ajack or bracket made of a forked horizontal pa-rt hooked to the rounds of the ladder, in connection with a brace having a forked lower end fitting the rounds and perforated upper end to lock to the bent end of the supporting part, which is further provided with a sliding piece havinga curved-up end to bear against the wall.

In the accompanying drawing, A represents a ladder of the usual construction used by carpenters, painters, and others; and B, the scat fold-supportin g jack or bracket attached there to by its forked and hook-shaped ends to the rear side of the ladder, as shown in the drawing. The horizontal piece of the jack is hooked to a round of the ladder and supported by a brace, O, which has a forked lower end that bears on one of the lower rounds of the ladder and retains in perforations of its upper end the outwardly-bent end of piece B at a horizontal or inclined position, admitting its adjustment to the pitch of the ladder.

The scaffold-boardin g is laid across the jacks of two or more ladders, and forms thereby a readily put up, cheap, and convenient scaffoldsupporting device for application in the various trades without requiring the use of nails, clamps, &c. The horizontal part of thejack, that is secured rigidly by its forked and hookshaped end to any round of the ladder, is further provided with a sliding extension-rod, D, guided in staples or hands. a, and secured by a clamp-screw, b. The outer end of the extension-rod D is curved and adjusted to bear against the Wall without injuring the same. The ladder is thereby steadied and. the scatfolding supported in a stiff and substantial manner to allow even the finest painters works.

The outer pin end of the jack may either simply be hooked to the brace or applied by a spring key or nut for producing a perfectlyreliable jack device for scaffolds.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The scafi'old-supporting piece of the jack, provided with a sliding adjustable extensionrod bearing against the wall to form an additional support to the ladder, substantially as set forth.

ABRAHAM BAUER.

Witnesses:

MATTHIAS KIBLER, D. D. JOHNSTON- 

